They can just focus on obvious cases: people that upload new images at an astounding rate, people who forget to remove the AI watermarks, and people who simply admit to using AI. No need to turn it into a witch hunt where you accuse everyone of using AI.
It will 100% turn into a constant witch hunt - I can absolutely promise it.
Want an easy reference? See First Person Shooter games.
Turns out that once the computer can mostly do the job, you will see:
1. Constant use of the computer for that job
2. Constant accusations of using the computer in places that restrict it.
See basically every online FPS community that exists. And that's with incredibly invasive software running on player machines explicitly to stop them from using the computer to play - and People both still do it (in HUGE numbers), and the communities constantly bitch about the "rampant cheating".
One way to take down someone you don't like will be to accuse them of using AI. It's an accusation that's impossible to defend against; you could require people to provide a video showing them creating the art, but that adds enough friction to be the death of a community and down the line will itself be something that could be generated.
